本题目来源于试卷: SL/HL Topic B 3.1 Gas exchange，类别为 IB生物学
[单选题]
3. Which of the following are adaptati6) / ez// 4s4ydexvh zpcavy(don: nf/ o8rf9vcas of the spongy mesophyll for the intake of carbon dioxide to cf/9oa :rf8vnphotosynthetic leaf cells?
I. A water layer on the cell surface.
II. Air spaces between the mesophyll cells.
III. The presence of stomata.
IV. A large surface area.
A. All of the above
B. II and IV only
C. I, II and III only
D. I, II and IV only
参考答案: D
本题详细解析:
暂无
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